My touch faucet died. I can use a z44n mosfet to activate the solenoid with the 6V battery pack but I need to have the polarity switched each use to drive the solenoid in the opposite direction with the next touch. What can I put in the oval in the diagram to make the polarity switch on the battery?
What can I put in the oval in the diagram to make the polarity switch on the battery?
There is nothing effective that can be put in the oval area that will work. IRFZ44N MOSFETs (if that is what you mean) are not bi-directional. They will heavily conduct in the reverse direction due to their bulk diode.
Neither is it sensible to connect the faucet sensor directly to the gate of a MOSFET. These are electrostatic sensitive devices and can be easily destroyed without protection circuits.